Cover.



A. DREIER.

COVER.

APPLIQATION FILED Nov. 15. 191B.

Patented Apr. 1, 1919.

INVENTOR flbz-ahamflrea'er BY ma ATTORNEY is UNITED, STATEs PATENT OFFIGE.

ABRAHAM DREIER, or NEW YORK, N. Y.

COVER.

To all whom it may concern:

certain new and useful Im rovements in Covers, of which the followmg 1s a spec1- ficatlon.

' This invention relates to covers and is directed particularly to rovldm a cover with means for automatic ocking t e same over an opening.

I have embodied my invention in a coal hole cover masmuch as the automat1c locking of the same is of utmost importance as will hereinafter appear. It will be readily understood, however, that my invention as hereinafter described and claimed may be applied to any cover in which provision is desirable for automatic locking when the same is in place.

- As applied particularly to coal hole covers the present invention has for its main object to provide a cover of this character which shall be proof against bein dislocated by persons stepping thereon anc against bein tampered with and opened and to thus avoi accidents. Another object of my invention isto provide a coal hole cover having the advantages hereinbefore enumerated and being nevertheless simple in construction, sure in its operation, easy to manipulate, and comparatively inexpensive to manufacture.

u Referring to the drawings accompanying this specification and forming a material part thereof,

Figure 1 is a cross-sectional view through the cover and the automatic locking means cutalong 11 of Fig. 2;

Fig. 2 is a planview looking up from the opening.

Referring in detail to the drawing, my newly improved coal hole cover, one embodiment of my invention, is seen to comprise a frame 10, having a flange 11 whereby it may be'supported over the coal hole as on the side Walk 12. The cover proper 13 may be hinged to the frame in any suitable manner. In the form shown in the drawing I have provided the cover with extensions 14 preferably formed integral therewith and having eyes 15 to receive the pin 16 secured to the Specification of Letters Patent.

. Application filed November 15,1918. Serial No. 262,691.

frame in any suitable manner asby the bolts or rivets 17. j

The means whereby the cover is automatically locked to the frame when the former is in position over an opening will now be described in detail. Secured to the sides of the cover, or preferably formed integral therewith, is a bracket 18 consisting of two side members 19 and a cross member 20, adjacent the periphery of the cover, and said cross member is provided with an opening 21. Pivoted to the sides of the bracket, as by means of the pinion 22, is a compara tively heavy U-shaped link or arm 23 and pivoted to the latter adjacent the ends thereof by means such as the pinion 25 is a lock bar. As will be clear from the drawing the pinion 25 is mounted above the pinion 22 and in front thereof. In the side of the frame adjacent this lockin means I provide the opening 26 adapted to receive the locking bar 24: when the same is operated.

The operation of the locking means will now be clear. When the cover is in raised position as shown by the dotted lines in Fig. 1, the link 23 is substantially flush therewith. hcn the latter, however, is lowered the link 23 swings down by its own weight to the position shown in full lines in said figure and at the same time gives a lateral displacement to the locking bar 24 causing it to pass through the opening in the cross member 20 and into the opening 26 in the side of the frame. The key hole 27 disposed over the loop or U of the overweighted arm 23 is provided in the cover for a key which may be inserted to manipulate the link 23 so as to swing it upward and thus cause the locking bar to move out from the opening 26 to unlock the cover.

As already hereinbefore mentioned the automatic locking means herein described may of course be applied to any cover in which such locking is desired and I do not, of course, limit myself to the construction and application of my invention herein specifically described since many modifications may occur to one skilled in the art within the scope of the present invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1 The combination with a casing of a cover hinged thereto and having a key opening therein, an overweighted arm pivoted on the underside of the cover and formed in a loop disposed beneath said key openin in operative relation thereto, to be engaged by a key inserted through said opening, and a locking element adapted to be operated by the Weight of said overweighted arm to engage said casing and interlock therewith.

2. The combination With a casing of a cover hinged thereto and having a key open ing therein, an overweighted arm pivoted on the under side of the cover and formed in a lOO-p disposed beneath said key opening in operative relation thereto, to be engaged by a key inserted therethrough, and a locking element pivoted to said overweighted arm and adapted to be operated by the weight of the latter to engage said casing and interlock therewith.

Signed at New York city in the county of New York and State of New York this 12th day of November A. D. 1918.

ABRAHAM DREIER,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. a 

